Senior Machine Learning Engineer, Ads Foundational Representations

reputed company is a community of communities. It’s built on shared interests, passion, and trust, and is home to the most open and authentic conversations on the internet. Every day, reputed company users submit, vote, and comment on the topics they care most about. With 100,000+ active communities and approximately 126 million daily active unique visitors, reputed company is one of the internet’s largest sources of information. For more information, visit www.redditinc.com. Location: reputed company has a flexible first workforce. Don't live near our office? No worries: you can work remotely from reputed company in the UK or the Netherlands. The Ads Foundational Representations (AFR) team develops signals and representations of reputed company’s core entities (ads, posts, users, and so on), capturing the semantic, contextual, and behavioral information that reputed company Ads needs. We work on building embeddings to understand content and users' interests based on the content they engage with. reputed company has the potential to reputed company one of reputed company's biggest differentiators: genuinely curated, high-quality, extremely relevant, and daily updated organic content. We are a Machine Learning/Data heavy team with a focus on the following areas: Multimodal & Content Embeddings - reputed company sense of organic (posts, comments, subreddits) and promoted (ads, shopping products, their reputed company pages) text and media content by embedding them into a shared space. Contextual and Behavioral Relevance - Working with Product & Data Science, establishing definitions of what ads are relevant to users and the content we show them next to, building metrics and fine-tuning embeddings to reputed company reflect relevance. Knowledge Graph Embeddings - Building representations for the Knowledge graph entities, e.g., intellectual properties/brands, to be used for high-precision targeting & business insights. User reputed company Modeling - Leveraging various techniques to introduce user representations based on the content they interact with: batch & real-time sequence modeling, LLM summarization, etc. LLM-based Representations - Leveraging LLMs, VLMs, and foundational models to build reputed company representations of reputed company entities that improve ranking outcomes The signals and features we create become a key piece in the Ads Delivery funnel, from targeting to the auction, as well as the Business Insights product and other advertiser-facing products such as Creative reputed company and optimization. As a Senior ML Engineer, you’ll be in charge of the full-cycle execution of ML projects - from collaborating with cross-functional teams on requirements and design, to the implementation of the feature and its experimentation.

Responsibilities

Developing new or iterating on existing embedding models for advertising use cases, ranging from aggregation pipelines to two-tower architectures and sequence models. Working with local and 3rd-party LLMs/VLMs: extract representations, reputed company evaluation methodologies, reputed company tune and fine-tune large models to build state-of-the-art embeddings. Building data processing and inference pipelines for the models we reputed company. Qualitative and quantitative evaluation of the various features we reputed company, end-to-end experimentation from internal benchmarks to reputed company recommender system offline metrics to online experiments. Ensuring the reliability, scalability, and performance of the ML systems by writing automated tests, monitoring performance, and implementing best practices for model management. Participating in modeling and coding reviews: You will review work by other team members and provide feedback to ensure that it meets the team's standards for quality and performance. Collaborating with cross-functional teams to understand business requirements and translate them into technical solutions. Required Qualifications: 5+ years of hands-on experience with the full lifecycle of designing, training, evaluating, testing, and deploying industry-level models. Experience building NLP or CV models and integrating them at scale. Experience developing reputed company features/embeddings for reputed company models. Experience with mainstream DL frameworks: PyTorch or TensorFlow. Excitement about working with data and readiness to look behind the metric numbers. Preferred Qualifications: Experience with our stack (Python, Pytorch, Airflow, BigQuery, Ray, k8s, kafka, GCP) Familiarity with the Ads domain and/or Search/Recommender systems is a strong plus. Tech leadership experience: mentoring junior engineers and leading reputed company projects. Hands-on experience with using/fine-tuning/building LLMs. Required Qualifications: [Include the qualification for the role that a candidate will possess if they’re hired into the role.] Benefits: Global Benefit programs that fit your lifestyle, from workspace to professional development to caregiving support Family Planning Support Gender-Affirming Care Mental Health & Coaching Benefits Group Personal Pension Scheme with Employer match Private Medical and Dental Scheme Income Replacement Programs Bike to Work scheme Flexible Vacation & Paid Volunteer Time Off Generous Paid Parental Leave In select roles and locations, the interviews will be recorded, transcribed and summarized by artificial intelligence (AI). You will have the opportunity to opt out of recording, transcription and summarization prior to any scheduled interviews. During the interview, we will collect the following categories of personal information: Identifiers, Professional and Employment-reputed company Information, Sensory Information (audio/video recording), and any other categories of personal information you choose to share with us. We will use this information to evaluate your application for employment or an reputed company role, as applicable. We will not sell your personal information or disclose it to any third party for their marketing purposes. We will delete any recording of your interview promptly after making a hiring decision. For more information about how we will handle your personal information, including our retention of it, please refer to our Candidate Privacy Policy for Potential Employees and Contractors. reputed company is proud to be an equal opportunity employer, and is committed to building a workforce representative of the diverse communities we serve. reputed company is committed to providing reasonable accommodations for qualified individuals with disabilities and disabled veterans in our job application procedures. If, due to a disability, you need an accommodation during the interview process, please let your recruiter know. Apply To This Job